[ 24.100543] BUG: Bad rss-counter state mm:00000000c434774b type:MM_FILEPAGES val:33 [ 24.101762] BUG: Bad rss-counter state mm:00000000c434774b type:MM_ANONPAGES val:22 [ 24.139017] ================================================================== [ 24.139991] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.140930] Read of size 8 at addr ffff888019baad08 by task sshd/219 [ 24.141738] [ 24.141984] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.142936] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.143931] Call Trace: [ 24.144223] [ 24.144535] dump_stack_lvl+0x91/0xf0 [ 24.145016] print_report+0xcc/0x620 [ 24.145528] ? __virt_addr_valid+0x102/0x340 [ 24.146105] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.146748] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.147310] kasan_report+0xbe/0xf0 [ 24.147869] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.148428] vma_interval_tree_remove+0xc75/0xec0 [ 24.148975] vma_prepare+0xc54/0x11a0 [ 24.149417] __split_vma+0x5af/0x950 [ 24.149843] ? __pfx___split_vma+0x10/0x10 [ 24.150322] ? find_held_lock+0x2c/0x110 [ 24.150942] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.151456] ? lock_is_held_type+0x9f/0x120 [ 24.151940] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.152620] ? mtree_range_walk+0x632/0x900 [ 24.153180] ? mas_walk+0x5c7/0x7c0 [ 24.153622] do_vmi_munmap+0x1f1/0x2b0 [ 24.154069] mmap_region+0x1f9/0x2660 [ 24.154570] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.155035] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.155834] ? __pfx_lock_acquire+0x10/0x10 [ 24.156418] ? __pfx_mmap_region+0x10/0x10 [ 24.156899] ? security_mmap_addr+0x7d/0xa0 [ 24.157387] ? get_unmapped_area+0x1f5/0x3f0 [ 24.157884] do_mmap+0x854/0xf00 [ 24.158282] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.158729] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.159243] ksys_mmap_pgoff+0x3af/0x500 [ 24.159702] do_syscall_64+0x3f/0x90 [ 24.160136] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.160720] RIP: 0033:0x7fbc48080d82 [ 24.161138] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 24.163046] RSP: 002b:00007ffd92b21468 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.163864] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbc48080d82 [ 24.164630] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbc474ba000 [ 24.165411] RBP: 00007fbc474ba000 R08: 0000000000000009 R09: 0000000000001000 [ 24.166177] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556ccbe80ec0 [ 24.166940] R13: 00007ffd92b21480 R14: 00007ffd92b214b0 R15: 00007ffd92b21810 [ 24.167715] [ 24.167984] [ 24.168180] Allocated by task 208: [ 24.168566] kasan_save_stack+0x22/0x50 [ 24.169025] kasan_set_track+0x25/0x30 [ 24.169483] __kasan_slab_alloc+0x59/0x70 [ 24.169952] kmem_cache_alloc+0x16b/0x370 [ 24.170411] vm_area_dup+0x20/0x160 [ 24.170823] __split_vma+0x170/0x950 [ 24.171240] split_vma+0xc6/0x110 [ 24.171632] mprotect_fixup+0x8d2/0xb30 [ 24.172081] do_mprotect_pkey+0x87e/0xd40 [ 24.172556] __x64_sys_mprotect+0x78/0xc0 [ 24.173025] do_syscall_64+0x3f/0x90 [ 24.173454] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.174027] [ 24.174222] Freed by task 208: [ 24.174575] kasan_save_stack+0x22/0x50 [ 24.175028] kasan_set_track+0x25/0x30 [ 24.175470] kasan_save_free_info+0x2b/0x50 [ 24.175948] __kasan_slab_free+0x10a/0x190 [ 24.176426] kmem_cache_free+0x10d/0x4d0 [ 24.176883] rcu_core+0x8c8/0x2860 [ 24.177280] __do_softirq+0x1b7/0x7d4 [ 24.177726] [ 24.177923] Last potentially related work creation: [ 24.178446] kasan_save_stack+0x22/0x50 [ 24.178900] __kasan_record_aux_stack+0x8e/0xa0 [ 24.179414] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.179992] remove_vma+0x139/0x170 [ 24.180394] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.180897] do_vmi_munmap+0x1f1/0x2b0 [ 24.181333] __vm_munmap+0x138/0x3a0 [ 24.181764] __x64_sys_munmap+0x59/0x80 [ 24.182206] do_syscall_64+0x3f/0x90 [ 24.182632] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.183278] [ 24.183473] The buggy address belongs to the object at ffff888019baacb0 [ 24.183473] which belongs to the cache vm_area_struct of size 168 [ 24.184778] The buggy address is located 88 bytes inside of [ 24.184778] freed 168-byte region [ffff888019baacb0, ffff888019baad58) [ 24.186045] [ 24.186245] The buggy address belongs to the physical page: [ 24.186831] page:0000000067827ca4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19baa [ 24.187800] memcg:ffff888019b39901 [ 24.188180] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.188752] page_type: 0xffffffff() [ 24.189156] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.189980] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019b39901 [ 24.190788] page dumped because: kasan: bad access detected [ 24.191378] [ 24.191573] Memory state around the buggy address: [ 24.192097] ffff888019baac00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 24.192863] ffff888019baac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 24.193623] >ffff888019baad00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 24.194378] ^ [ 24.194765] ffff888019baad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 24.195525] ffff888019baae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 24.196272] ================================================================== [ 24.197159] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.535154] BUG: Bad rss-counter state mm:00000000e6a0794e type:MM_FILEPAGES val:33 [ 26.536162] BUG: Bad rss-counter state mm:00000000e6a0794e type:MM_ANONPAGES val:22 [ 27.018019] BUG: Bad rss-counter state mm:000000009b168720 type:MM_FILEPAGES val:33 [ 27.019046] BUG: Bad rss-counter state mm:000000009b168720 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20976' (ECDSA) to the list of known hosts. 2023/06/20 16:56:50 fuzzer started 2023/06/20 16:56:50 dialing manager at localhost:36067 2023/06/20 16:56:50 checking machine... 2023/06/20 16:56:50 checking revisions... [ 27.768044] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:56:50 testing simple program... [ 27.813373] cgroup: Unknown subsys name 'net' [ 27.856259] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:56:50 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff846000a9 RDX=0000000000036000 RSI=0000000000036000 RDI=ffffffff865c19f0 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =0000000000000000 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5080 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff8113077a RFL=00000212 [----A--] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb3fc4b7900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffdf57d5000 CR3=000000000cae8000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fdc7cd2b398 CR3=000000000c506000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=307ec0a56a45adb6d94d643a632804a1 XMM02=000000000011bd90ec2efd57dc4c00df XMM03=0000000000121338233e4a470c8f3d57 XMM04=6a6c8ced94d445f500000000000ae988 XMM05=dfcdbad4f1609c370000000000131ea0 XMM06=33325ac3144d41910000000000131078 XMM07=e042d86d42eb936e0000000000121610 XMM08=233e4a470c8f3d57000000000011bdf0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000